WO2013111410A1 - Circuit d'égalisation de tension de cellule de batterie - Google Patents

Circuit d'égalisation de tension de cellule de batterie Download PDF

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Publication number
WO2013111410A1
WO2013111410A1 PCT/JP2012/078221 JP2012078221W WO2013111410A1 WO 2013111410 A1 WO2013111410 A1 WO 2013111410A1 JP 2012078221 W JP2012078221 W JP 2012078221W WO 2013111410 A1 WO2013111410 A1 WO 2013111410A1
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WO
WIPO (PCT)
Prior art keywords
battery cell
path
switch
battery
fuse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/078221
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English (en)
Japanese (ja)
Inventor
宗隆 山本
正彰 鈴木
守 倉石
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
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Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Priority to US14/372,301 priority Critical patent/US20150022155A1/en
Priority to EP12866674.0A priority patent/EP2808973A4/fr
Priority to CN201280067335.4A priority patent/CN104040826A/zh
Publication of WO2013111410A1 publication Critical patent/WO2013111410A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
    • H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
    • H02J7/56—Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/62—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements against overcurrent
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/865—Battery or charger load switching, e.g. concurrent charging and load supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to a circuit for equalizing the voltages of a plurality of battery cells connected in series.
  • a technology for realizing a high voltage battery by connecting a plurality of rechargeable battery cells in series has been put into practical use.
  • this type of battery has attracted attention in mounting on, for example, an electric vehicle or a hybrid vehicle using an engine and a motor together.
  • the output voltage of each battery cell may become uneven.
  • the voltage of the battery cell may become non-uniform even by repeating this charge / discharge. is there.
  • the nonuniformity of the voltage of a battery cell may accelerate
  • the nonuniformity of the voltage of a battery cell may arise by the manufacture dispersion
  • FIG. 8 is a diagram showing an example of a conventional battery cell voltage equalization circuit.
  • the battery 100 includes two rechargeable battery cells B1 and B2. Battery cells B1 and B2 are connected in series with each other. A load 110 is connected to the battery 100.
  • the battery cell voltage equalization circuit has an inductor L, switches S1 and S2, driver circuits D1 and D2, and a battery controller 10, as shown in FIG.
  • the battery controller 10 monitors the voltage of each battery cell B1, B2. In the following description, it is assumed that the voltage of the battery cell B1 is higher than the voltage of the battery cell B2. And the battery controller 10 produces
  • the driver circuit D1 is an inverting driver, and the driver circuit D2 is a non-inverting driver. Therefore, when the battery controller 10 outputs a pulse train signal, the switches S1 and S2 are alternately controlled to be in the ON state. That is, when the switch S1 is controlled to be in the ON state, the switch S2 is controlled to be in the OFF state, and when the switch S1 is controlled to be in the OFF state, the switch S2 is controlled to be in the ON state.
  • Patent documents 1 to 5 are known as related technologies.
  • overcurrent may occur during the cell balance operation.
  • an overcurrent may occur in the following situation. (1) Due to the malfunction of the battery controller 10 or the driver circuits D1, D2, the switches S1 and S2 are simultaneously turned on. (2) The switch S1 or S2 is short-circuited due to a failure. (3) The ON time of the switch S1 or S2 becomes too long (the duty of the pulse train signal becomes too large).
  • An object of the present invention is to protect a battery cell and a battery cell voltage equalization circuit from overcurrent in a battery cell voltage equalization circuit that equalizes the voltages of a plurality of battery cells connected in series.
  • the battery cell voltage equalization circuit equalizes the voltages of the first and second chargeable battery cells connected in series.
  • the battery cell voltage equalization circuit is electrically connected to the positive electrode of the first battery cell via a first path and electrically connected to the negative electrode of the first battery cell via a second path.
  • a first switch that electrically connects or disconnects the first path and the second path, and is electrically connected to the positive electrode of the second battery cell via the second path.
  • the fuse when an overcurrent occurs in the first to third paths, the fuse is blown, and thus the first battery cell and / or the second battery cell is protected from the overcurrent.
  • the fuse when the fuse is provided in two or more of the first to third paths, both the first battery cell and the second battery cell are protected from overcurrent.
  • the configuration having the fuse in only one of the first to third paths at least one of the first battery cell and the second battery cell is protected from overcurrent. In this case, for example, when a path or pattern in which an overcurrent is likely to occur is predicted, a problem due to the overcurrent can be avoided by providing a fuse according to the path or pattern.
  • the first switch and the second switch are simultaneously turned on, if a fuse is provided in the first or third path, the first battery is prevented from an overcurrent caused by the failure.
  • the cell and the second battery cell are protected.
  • the first switch and the second switch constituting the battery cell voltage equalization circuit are also protected from overcurrent.
  • the fuses may be provided in two of the first to third paths. If fuses are provided in two of the first to third paths, the current flowing between the positive electrode of the first battery cell and the negative electrode of the first battery cell via the first switch and the inductor Current flowing through the second switch and inductor between the positive electrode of the second battery cell and the negative electrode of the second battery cell, between the positive electrode of the first battery cell and the negative electrode of the second battery cell In any of the currents flowing through the first switch and the second switch, any one of the fuses will be blown even if any current is in an overcurrent state. Therefore, the first battery cell and the second switch Battery cells are protected from overcurrent. In the configuration in which a fuse is provided in the second path, the fuse is provided, for example, between the negative electrode of the first battery cell and the positive electrode of the second battery cell and the inductor.
  • the battery cell voltage equalization circuit having the above configuration includes a monitoring means for monitoring a voltage across the first switch, a voltage across the second switch, and a current flowing through the inductor, and a monitoring result by the monitoring means. Based on this, a detecting means for detecting the blow of the fuse may be further provided. According to this configuration, when the battery cell voltage equalization circuit has a plurality of fuses, it is possible to easily detect which fuse has blown.
  • the battery cell and the battery cell voltage equalization circuit can be protected from overcurrent.
  • FIG. 5 is a diagram (part 1) illustrating an embodiment of a battery cell voltage equalization circuit in which the number of fuses is reduced as compared with the configuration illustrated in FIG.
  • FIG. 5 is a diagram (part 2) illustrating an embodiment of a battery cell voltage equalization circuit in which the number of fuses is reduced as compared with the configuration illustrated in FIG.
  • FIG. 5 is a diagram (part 2) illustrating an embodiment of a battery cell voltage equalization circuit in which the number of fuses is reduced as compared with the configuration illustrated in FIG.
  • It shows an example of the conventional battery cell voltage equalization circuit.
  • FIG. 1 is a diagram showing a configuration of a battery cell voltage equalization circuit according to an embodiment of the present invention.
  • the battery cell voltage equalization circuit 1 according to the embodiment equalizes voltages of a plurality of rechargeable battery cells connected in series.
  • the battery cell voltage equalization circuit 1 equalizes the voltages of the two battery cells B1 and B2 connected in series.
  • Battery cells B ⁇ b> 1 and B ⁇ b> 2 are accommodated in the battery 100.
  • the battery 100 and the battery cell voltage equalization circuit 1 are mounted on, for example, an electric vehicle or a hybrid vehicle using both an engine and a motor.
  • the battery 100 is charged by a charger (not shown).
  • the battery 100 is used to supply power to at least the traveling motor.
  • the load 110 shown in FIG. 1 is a motor including an inverter and the like. Further, the battery 100 is charged by a regenerative current generated due to the travel motor when the vehicle is decelerated or the like.
  • the battery cell voltage equalization circuit 1 includes a battery controller 2, driver circuits D1 and D2, switches S1 and S2, an inductor L, and fuses h1 to h3.
  • the battery cell voltage equalization circuit 1 equalizes or substantially equalizes the voltages of the battery cells B1 and B2 when a cell balance control instruction is given.
  • the battery controller 2 includes, for example, a microcomputer. In this case, the battery controller 2 may execute a cell balance processing program stored in a memory (not shown).
  • the battery controller 2 may be realized using an FPGA, an ASIC, or the like.
  • the battery controller 2 executes a cell balance operation for equalizing the voltages of the battery cells B1 and B2 when a cell balance control instruction is given.
  • the cell balance control instruction is given from, for example, an upper layer.
  • a cell balance control instruction is issued by a CPU that controls the vehicle.
  • a cell balance control instruction may be issued according to user input.
  • the battery controller 2 generates a control signal for equalizing the voltages of the battery cells B1 and B2 while monitoring the voltage E1 of the battery cell B1 and the voltage E2 of the battery cell B2.
  • This control signal is, for example, a pulse train signal having a predetermined duty. Note that the duty of the pulse train signal may or may not be constant.
  • the control signal (namely, pulse train signal) output from the battery controller 2 is guide
  • the voltages of the battery cells B1 and B2 are detected by the voltage sensors 3-1 and 3-2, respectively.
  • the voltage sensors 3-1 and 3-2 may be connected to the outside of the battery 100 as shown in FIG. 1 or may be provided inside the battery 100.
  • the driver circuit D1 is an inverting driver, and the driver circuit D2 is a non-inverting driver. Therefore, when the battery controller 2 outputs a pulse train signal, the switches S1 and S2 are alternately controlled to be in the ON state. That is, when the control signal is at the H level, the output of the driver circuit D1 is at the L level, and the output of the driver circuit D2 is at the H level. When the control signal is at L level, the output of driver circuit D1 is at H level and the output of driver circuit D2 is at L level.
  • the switches S1 and S2 include a first terminal, a second terminal, and a control terminal, respectively, and electrically connect or disconnect the first terminal and the second terminal according to a signal applied to the control terminal.
  • the switches S1 and S2 are not particularly limited, but are, for example, NMOS transistors as shown in FIG.
  • the switches S1 and S2 are assumed to be NMOS transistors, respectively.
  • the first terminal, the second terminal, and the control terminal correspond to a drain, a source, and a gate, respectively.
  • the gate of the switch S1 is electrically connected to the output terminal of the driver circuit D1.
  • the drain of the switch S1 is electrically connected to the positive electrode of the battery cell B1 through the fuse h1.
  • the source of the switch S1 is electrically connected to the drain of the switch S2 and the first terminal of the inductor L.
  • the second terminal of the inductor L is electrically connected to the negative electrode of the battery cell B1 and the positive electrode of the battery cell B2 via the fuse h2.
  • the gate of the switch S2 is electrically connected to the output terminal of the driver circuit D2.
  • the drain of the switch S2 is electrically connected to the source of the switch S1 and the first terminal of the inductor L.
  • the source of the switch S2 is electrically connected to the negative electrode of the battery cell B2 via the fuse h3.
  • the path between the positive electrode of the battery cell B1 and the drain of the switch S1 is referred to as a first path.
  • the path between the negative electrode of the battery cell B1 and the positive electrode of the battery cell B2, the source of the switch S1, and the drain of the switch S2 A path between them is called a second path
  • a path between the negative electrode of the battery cell B2 and the source of the switch S2 is called a third path.
  • the switch S1 is electrically connected to the positive electrode of the battery cell B1 via the first path, and is electrically connected to the negative electrode of the battery cell B1 via the second path.
  • the second path are electrically connected or disconnected.
  • the switch S2 is electrically connected to the positive electrode of the battery cell B2 via the second path, and is electrically connected to the negative electrode of the battery cell B2 via the third path.
  • the path and the third path are electrically connected or disconnected.
  • the operation of the battery cell voltage equalization circuit 1 shown in FIG. 1 will be described.
  • the operation after the battery controller 2 receives the cell balance control instruction will be described. It is assumed that the voltage E1 of the battery cell B1 is higher than the voltage E2 of the battery cell B2 when the battery controller 2 receives the cell balance control instruction.
  • Battery controller 2 outputs a pulse train signal as a control signal for controlling the voltage balance of battery cells B1 and B2.
  • the control signal is at the L level
  • the switch S1 is controlled to be in the ON state and the switch S2 is controlled to be in the OFF state.
  • a current flows from the positive electrode of the battery cell B1 to the negative electrode of the battery cell B1 via the switch S1 and the inductor L. That is, the battery cell B1 is discharged. Thereby, the voltage of battery cell B1 falls. Further, energy is accumulated in the inductor L by this current.
  • the switch S1 is controlled to the OFF state and the switch S2 is controlled to the ON state.
  • current flows in the direction of charging the battery cell B2 via the switch S2 and the inductor L by the energy accumulated in the inductor L.
  • the voltage of battery cell B2 rises. Therefore, by repeating the switching operation described above, the voltages of the battery cells B1 and B2 approach each other.
  • the battery controller 2 ends the cell balance operation. As a result, the voltages of the battery cells B1 and B2 are equalized or substantially equalized.
  • FIG. 2 shows a current path assumed in the battery cell voltage equalization circuit 1 shown in FIG.
  • the battery cell voltage equalization circuit 1 In the battery cell voltage equalization circuit 1, three current paths K1 to K3 shown in FIG. 2 are assumed according to the state of the circuit.
  • the current path K1 extends from the positive electrode of the battery cell B1 to the negative electrode of the battery cell B1 via the fuse h1, the switch S1, the inductor L, and the fuse h2.
  • This current path K1 is formed when the switch S1 is controlled to the ON state and the switch S2 is controlled to the OFF state.
  • a current flows in the clockwise direction in FIG. 2 via the current path K1
  • a current flows in the counterclockwise direction in FIG. 2 via the current path K1. .
  • the current path K2 extends from the positive electrode of the battery cell B2 to the negative electrode of the battery cell B2 via the fuse h2, the inductor L, the switch S2, and the fuse h3.
  • This current path K2 is formed when the switch S1 is controlled to the OFF state and the switch S2 is controlled to the ON state. Note that when battery cell B2 is discharged, current flows in the clockwise direction in FIG. 2 via current path K2, and when battery cell B2 is charged, current flows in the counterclockwise direction in FIG. 2 via current path K2. .
  • the current path K3 extends from the positive electrode of the battery cell B1 to the negative electrode of the battery cell B2 via the fuse h1, the switch S1, the switch S2, and the fuse h3.
  • This current path K3 is formed when both the switches S1 and S2 are in the ON state (or short state). That is, the current path K3 is mainly formed when a failure occurs in the battery cell voltage equalization circuit 1.
  • the fuse provided on the path through which the overcurrent flows is blown.
  • the overcurrent is stopped and the battery 100 or the battery cells B1 and B2 are protected.
  • the switch S1 and the switch S2 constituting the battery cell voltage equalization circuit 1 are also protected from overcurrent.
  • FIG. 3 shows an embodiment of a battery cell voltage equalization circuit in which the number of fuses is reduced as compared with the configuration shown in FIGS.
  • the fuse h2 is not inserted as compared with the configuration shown in FIGS.
  • the fuse h1 when an overcurrent occurs in the current path K1, the fuse h1 is blown.
  • the fuse h3 is blown.
  • the fuse h1 or h3 is blown. In other words, if any of the current paths K1 to K3 generates an overcurrent, any of the fuses h1 to h3 is blown, so that the battery cells B1, B2 and the switches S1, S2 are protected from the overcurrent. .
  • the fuse h3 is not inserted as compared with the configuration shown in FIGS.
  • the fuse h1 or h2 is blown.
  • the fuse h2 is blown.
  • the fuse h1 is blown.
  • the fuse h1 is not inserted as compared with the configuration shown in FIGS.
  • the fuse h2 is blown.
  • the fuse h2 or h3 is blown.
  • the fuse h3 is blown.
  • the battery cell voltage equalization circuit 1 has n fuses. That is, according to the configuration shown in FIG. 3, compared to the configuration shown in FIGS. 1 and 2, each battery cell B1, B2 and switch S1, S2 can be protected from overcurrent while reducing the number of fuses. it can.
  • the battery cell voltage equalization circuit 1 of the embodiment has three or more batteries. It is also possible to equalize the cell voltages.
  • a battery cell voltage equalization circuit that equalizes the voltages of three or more battery cells will be described.
  • FIG. 4 shows a configuration of a battery cell voltage equalization circuit that equalizes the voltages of four battery cells.
  • the battery cell voltage equalization circuit includes switches S1 to S6, inductors L1 to L3, fuses h1 to h5, and a switch control circuit 4.
  • the battery cells B1 to B4 are connected in series.
  • Switches S1 to S2 and an inductor L1 are provided for the battery cells B1 to B2.
  • the switches S1 to S2 and the inductor L1 have the same circuit configuration as the switches S1 to S2 and the inductor L shown in FIG. That is, the first terminal of the switch S1 is electrically connected to the positive electrode of the battery cell B1.
  • the second terminal of the switch S1 is electrically connected to the first terminal of the switch S2, and is also electrically connected to the negative electrode of the battery cell B1 via the inductor L1.
  • the negative electrode of the battery cell B1 is electrically connected to the positive electrode of the battery cell B2.
  • the second terminal of the switch S2 is electrically connected to the negative electrode of the battery cell B2.
  • switches S3 to S4 and an inductor L2 are provided for the battery cells B2 to B3.
  • the first terminal of the switch S3 is electrically connected to the positive electrode of the battery cell B2.
  • the second terminal of the switch S3 is electrically connected to the first terminal of the switch S4, and is electrically connected to the negative electrode of the battery cell B2 via the inductor L2.
  • the negative electrode of the battery cell B2 is electrically connected to the positive electrode of the battery cell B3.
  • the second terminal of the switch S4 is electrically connected to the negative electrode of the battery cell B3.
  • switches S5 to S6 and an inductor L3 are provided for the battery cells B3 to B4.
  • the first terminal of the switch S5 is electrically connected to the positive electrode of the battery cell B3.
  • the second terminal of the switch S5 is electrically connected to the first terminal of the switch S6 and is also electrically connected to the negative electrode of the battery cell B3 via the inductor L3.
  • the negative electrode of the battery cell B3 is electrically connected to the positive electrode of the battery cell B4.
  • the second terminal of the switch S6 is electrically connected to the negative electrode of the battery cell B4.
  • the battery cell voltage equalization circuit shown in FIG. 4 has fuses h1 to h5 in each wiring electrically connected to the battery cells B1 to B4.
  • the switch control circuit 4 controls the switches S1 to S6 so that the voltages of the battery cells B1 to B4 are equalized. At this time, the switch control circuit 4 gives control signals corresponding to the control terminals of the switches S1 to S6. Specifically, when the switch control circuit 4 equalizes the voltages of the battery cells B1 and B2, the switch control circuit 4 alternately controls the switches S1 and S2 to equalize the voltages of the battery cells B2 and B3. Controls the switches S3 and S4 alternately in the ON state, and when equalizing the voltages of the battery cells B3 and B4, controls the switches S5 and S6 alternately in the ON state.
  • the voltage equalization of the battery cells B1 and B2, the voltage equalization of the battery cells B2 and B3, and the voltage equalization of the battery cells B3 and B4 are performed by a time division method, for example. Then, the switch control circuit 4 performs the above switching operation until the voltage difference (for example, the difference between the maximum value and the minimum value) of the battery cells B1 to B4 becomes smaller than a predetermined threshold value.
  • current paths K1 to K9 shown in FIG. 4 are assumed.
  • Current paths K1 to K3 are substantially the same as current paths K1 to K3 shown in FIG.
  • the current paths K4 to K6 and the current paths K7 to K9 are substantially the same path patterns as the current paths K1 to K3, respectively.
  • the current paths K4 to K6 are formed by equalizing the voltages of the battery cells B2 and B3
  • the current paths K7 to K9 are formed by equalizing the voltages of the battery cells B3 and B4.
  • the fuse h1 or h2 is blown.
  • the fuse h2 or h3 is blown.
  • the fuse h1 or h3 is blown.
  • the fuse h2 or h3 is blown.
  • the fuse h3 or h4 is blown.
  • the fuse h2 or h4 is blown.
  • the fuse h3 or h4 is blown.
  • the fuse h3 or h4 is blown.
  • the fuse h3 or h4 is blown.
  • the fuse h3 or h4 is blown.
  • the fuse h4 or h5 When an overcurrent occurs in the current path K8, the fuse h4 or h5 is blown. When an overcurrent occurs in the current path K9, the fuse h3 or h5 is blown. As described above, even if an overcurrent occurs in any current path, the battery cells B1 to B4 and the switches S1 to S6 are protected from the overcurrent.
  • FIG. 5 to 6 show an embodiment of a battery cell voltage equalization circuit in which the number of fuses is reduced as compared with the configuration shown in FIG.
  • the fuse h5 is not inserted as compared with the configuration shown in FIG.
  • the fuses h4, h3, h2, and h1 are respectively compared with the configuration shown in FIG. Is not provided.
  • any of the fuses is blown, so that the battery cells B1 to B4 and the switches S1 to S6 Protected from overcurrent.
  • the number of fuses may be further reduced.
  • the number of fuses may be further reduced.
  • the fuses h1 is not provided in FIG. 4, the fuses h2 and h3 cannot be deleted.
  • the fuse h2 is not provided, the fuses h1, h3, and h4 cannot be deleted. Therefore, when the number of fuses is reduced to three in FIG. 4, all the battery cells B1 to B4 and the switches S1 to S6 can be protected from overcurrent with the following three configurations.
  • FIG. 7 is a diagram illustrating a configuration and a method for detecting a blown fuse in the battery cell voltage equalization circuit 1.
  • the battery cell voltage equalization circuit 1 includes voltage sensors 5-1 and 5-2 and a current sensor 6 for detecting a blown fuse in addition to the configuration shown in FIG.
  • the voltage sensor 5-1 detects the voltage across the switch S1.
  • the voltage sensor 5-2 detects the voltage across the switch S2.
  • the current sensor 6 includes a shunt resistor provided in series with the inductor L, and detects a current flowing through the inductor L.
  • the determination of fuse blown is performed by, for example, the battery controller 2 shown in FIG.
  • the battery controller 2 uses the voltage E1 of the battery cell B1 detected by the voltage sensor 3-1, the voltage E2 of the battery cell B2 detected by the voltage sensor 3-2, and the switch detected by the voltage sensor 5-1.
  • the voltage V1 across S1, the voltage V2 across the switch S2 detected by the voltage sensor 5-2, and the inductor current detected by the current sensor 6 are monitored.
  • the battery controller 2 controls both the switches S1 and S2 to be in the OFF state. In this case, if the fuse h2 is not blown, V2 ⁇ E2 is obtained. On the other hand, if the fuse h2 is blown, V2 ⁇ E2 is detected. Therefore, the battery controller 2 can determine the state of the fuse h2 by monitoring the outputs of the voltage sensors 3-2 and 5-2.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un circuit d'égalisation de tension de cellule de batterie (1) qui égalise la tension de cellules de batterie connectées en série (B1, B2). Un commutateur (S1) est connecté électriquement avec l'électrode positive de la cellule de batterie (B1) par un premier chemin et est connecté électriquement avec l'électrode négative de la cellule de batterie (B1) par un deuxième chemin, et connecte ou déconnecte électriquement le premier chemin et le deuxième chemin. Un commutateur (S2) est connecté électriquement avec l'électrode positive de la cellule de batterie (B2) par le deuxième chemin et est connecté électriquement avec l'électrode négative de la cellule de batterie (B2) par un troisième chemin, et connecte ou déconnecte électriquement le deuxième chemin et le troisième chemin. Un inducteur (L) est disposé sur le deuxième chemin. Des fusibles respectifs (h1 à h3) sont disposés sur les premier à troisième chemins. Les commutateurs (S1, S2) sont commandés de manière alternative pour être sur marche.
PCT/JP2012/078221 2012-01-25 2012-10-31 Circuit d'égalisation de tension de cellule de batterie Ceased WO2013111410A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US14/372,301 US20150022155A1 (en) 2012-01-25 2012-10-31 Battery cell voltage equalization circuit
EP12866674.0A EP2808973A4 (fr) 2012-01-25 2012-10-31 Circuit d'égalisation de tension de cellule de batterie
CN201280067335.4A CN104040826A (zh) 2012-01-25 2012-10-31 电池组电池电压均衡电路

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JP2012-012818 2012-01-25
JP2012012818A JP5387703B2 (ja) 2012-01-25 2012-01-25 電池セル電圧均等化回路

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WO2013111410A1 true WO2013111410A1 (fr) 2013-08-01

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US (1) US20150022155A1 (fr)
EP (1) EP2808973A4 (fr)
JP (1) JP5387703B2 (fr)
CN (1) CN104040826A (fr)
WO (1) WO2013111410A1 (fr)

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CN110832334B (zh) * 2017-06-20 2022-09-27 株式会社杰士汤浅国际 故障诊断装置
JP7007681B2 (ja) * 2017-09-29 2022-01-25 ＮＥｘＴ－ｅ Ｓｏｌｕｔｉｏｎｓ株式会社 制御装置、バランス補正システム、蓄電システム、及び、装置
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EP2808973A1 (fr) 2014-12-03
JP2013153588A (ja) 2013-08-08
JP5387703B2 (ja) 2014-01-15
EP2808973A4 (fr) 2015-11-11
US20150022155A1 (en) 2015-01-22

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